德国黑白花奶牛体型结构及其与产奶量的关系

本文通过15项体尺和10项体尺指数系统地描述了德国黑白花第一胎泌乳牛的体型结构,并研究了体型结构和产奶量之关系。结果显示,在所有体尺中仅臀角宽和产奶量的相关(0.3681)达到显著水平,其它体尺的相关均较小;胸深和腰角宽对产奶量的通径系数分别为0.3209和0.3214,多数体尺对产奶量的直接影响均较小。德国黑白花奶牛体型结构存在尻长等于十字宽和胸深是胸宽两倍的特点。

Study of Correlation Between Milk Yield and Body Size in Germany's Black and White Cows

In this paper, the 15 body sizes and the 10 indexs of body sizes in 60 Germany's black andwhite cows have been described systematically, and the correlation between milk yield in 1thlactation and the body size have beenalso analysied. The results show that in correlations betweenthe milk yield and all body sizes of cows in 1th lactation, the correlation between the milk yieldand hip width is significant, 0. 3681. The path coe. of chest depth and hip width to the milk yieldare 0. 3209 and 0. 3214, respectively, and the path coe. of great majority of body sizes to themilk yield are very nosignificant.